28490454146025 has 81 divisors (see below), whose sum is σ = 51202669551397. Its totient is φ = 15143539382400.

The previous prime is 28490454146023. The next prime is 28490454146051. The reversal of 28490454146025 is 52064145409482.

The square root of 28490454146025 is 5337645.

It is a perfect power (a square), and thus also a powerful number.

28490454146025 is a `hidden beast` number, since 2 + 8 + 4 + 90 + 4 + 541 + 4 + 6 + 0 + 2 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3576739565529 + 24913714580496 = 1891227^2 + 4991364^2 .

It is not a de Polignac number, because 28490454146025 - 2¹ = 28490454146023 is a prime.

It is a super-2 number, since 2×28490454146025² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28490454146023) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 41713695334 + ... + 41713696016.

Almost surely, 2^{28490454146025} is an apocalyptic number.

28490454146025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28490454146025 is the 5337645-th square number.

28490454146025 is the 2668823-rd centered octagonal number.

It is an amenable number.

28490454146025 is a deficient number, since it is larger than the sum of its proper divisors (22712215405372).

28490454146025 is an frugal number, since it uses more digits than its factorization.

28490454146025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2424 (or 1212 counting only the distinct ones).

The product of its (nonzero) digits is 11059200, while the sum is 54.

The spelling of 28490454146025 in words is "twenty-eight trillion, four hundred ninety billion, four hundred fifty-four million, one hundred forty-six thousand, twenty-five".